Pradhan, Zia SShroff, SujaniBansod, ApurvaPoornachandra, BShetty, AnishaDevi, SathiRao, Dhanaraj A SPuttaiah, Narendra KRao, Harsha L2023-08-252023-08-252022-07Pradhan Zia S, Shroff Sujani, Bansod Apurva, Poornachandra B, Shetty Anisha, Devi Sathi, Rao Dhanaraj A S, Puttaiah Narendra K, Rao Harsha L. Prevalence of primary angle-closure disease in retinitis pigmentosa. Indian Journal of Ophthalmology. 2022 Jul; 70(7): 2449-24511998-36890301-4738http://imsear.searo.who.int/handle/123456789/224489To determine the prevalence of primary angle?closure disease (PACD) in patients with retinitis pigmentosa (RP). Methods: This was a retrospective review of the electronic medical records of all RP patients over the age of 10 years attending the Genetics Eye Clinic of a tertiary?care hospital during a 7?year period. Information regarding age, gender, vision, refraction, lens, intraocular pressure (IOP), type of RP, and inheritance pattern using pedigree charts for all patients were obtained. Patients with a shallow anterior chamber, high IOP, or glaucomatous optic discs were referred to the glaucoma department where they underwent additional IOP measurements, a gonioscopy, and disc evaluation by a glaucoma specialist. The prevalence of PACD was determined. Results: A total of 618 RP patients were examined during the study period, of which 95.1% had typical RP. The prevalence of primary angle?closure suspects was 2.9%, primary angle closure was 0.65%, and primary angle?closure glaucoma (PACG) was 2.27%. In contrast, the prevalence of primary open?angle glaucoma was 1.29%. The prevalence of PACG in those older than 40 years was 3.8% (95% confidence interval: 1.6–6.0). Conclusion: The prevalence of PACG in RP patients over 40 years was higher than that found in the general population of a similar age (3.8% vs. 0.8%). In our cohort of RP patients, 5.9% had PACD. Hence, gonioscopy is warranted in all RP patients to identify this condition and treat it appropriately.Glaucomaprimary angle?closure diseaseretinitis pigmentosaJournal ArticleIndiaDepartment of Glaucoma, Narayana Nethralaya, Bengaluru, Karnataka, IndiaDepartment of Retina, Narayana Nethralaya, Bengaluru, Karnataka, India